components

问题 In my current Angular 5 project, I have been making successful API calls from my service (Code kept clean for brevity) myService.ts : @Injectable() export class my-service-service { constructor(private _http: HttpClient) { } myData1() { return this._http.get("API_URL") .map(result => result); } And accessing that information on my connected component by subscribing to the above service. myComponent.ts: import { myServiceService } from './my-service-service.service'; @Component({ ... })

问题 In my current Angular 5 project, I have been making successful API calls from my service (Code kept clean for brevity) myService.ts : @Injectable() export class my-service-service { constructor(private _http: HttpClient) { } myData1() { return this._http.get("API_URL") .map(result => result); } And accessing that information on my connected component by subscribing to the above service. myComponent.ts: import { myServiceService } from './my-service-service.service'; @Component({ ... })

问题 I have three components as shown on the image below and use a custom form component in my feature component. However, there is not a direct parent-child relationship between these two components and there is also a form component between them. I pass data from feature to form using @Input propert that has input values inside a config data (let's say "configData") and then pass them to custom component via @Input property (let's say "configData.test" for test input) without any problem (I can

问题 So i have my form validation. And my question is can i get for example a minlength value which i passed at creating formControl? I havent found any information. This is my dumb component and i want to get minlength value to pass to information. Now i need to pass it via @Input(). title: ['', [Validators.required, Validators.minLength(4), Validators.maxLength(20)]] . <div class="validation-window"> <p *ngIf="errors.required"> {{field}} required </p> <p *ngIf="formControl.hasError('minlength')"

问题 So i have my form validation. And my question is can i get for example a minlength value which i passed at creating formControl? I havent found any information. This is my dumb component and i want to get minlength value to pass to information. Now i need to pass it via @Input(). title: ['', [Validators.required, Validators.minLength(4), Validators.maxLength(20)]] . <div class="validation-window"> <p *ngIf="errors.required"> {{field}} required </p> <p *ngIf="formControl.hasError('minlength')"

问题 I'm trying to build a simple unit convertor to practice React.js. I want to be able to change the value of one unit eg: Kg, and have the other unit eg: lb to automatically change on the screen. Please see this website to give you an idea: http://www.convertunits.com/from/lb/to/kg I have the following code, it renders but the units don't update. What I want to know is: Is it even accurate for one component to have two states ? 1 for Kg and another for lb Or would they need to be sibling

问题 I'm trying to build a simple unit convertor to practice React.js. I want to be able to change the value of one unit eg: Kg, and have the other unit eg: lb to automatically change on the screen. Please see this website to give you an idea: http://www.convertunits.com/from/lb/to/kg I have the following code, it renders but the units don't update. What I want to know is: Is it even accurate for one component to have two states ? 1 for Kg and another for lb Or would they need to be sibling

问题 I'm trying to build a simple unit convertor to practice React.js. I want to be able to change the value of one unit eg: Kg, and have the other unit eg: lb to automatically change on the screen. Please see this website to give you an idea: http://www.convertunits.com/from/lb/to/kg I have the following code, it renders but the units don't update. What I want to know is: Is it even accurate for one component to have two states ? 1 for Kg and another for lb Or would they need to be sibling

问题 I'm currently making a GUI that makes use of the FlowLayout class. Now, this class is meant to allow components be set by their prefer sized methods and I believe, isn't supposed to have priority in setting the component size. However, when I used a setSize method for a JTextField, the FlowLayout object didn't seem to recognize the change size command. But when I used the setColumn method, the FlowLayout object did respond to the change in size command. Why is this? 回答1: FlowLayout object

问题 Dynamic components were loading absolutely fine in Angular 8. Once a component is loaded, Detach and Interest of components was also working fine. I am using ng-three-template. loadComponent(componentID: number, component: any) { this.viewContainerRef.detach(); if( this.componentFactory[componentID] == undefined ) { this.componentFactory[componentID] = this.componentFactoryResolver.resolveComponentFactory( component ); this.componentRef[componentID] = this.viewContainerRef.createComponent(